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- <html>
- <head>
- <script type="text/javascript">
- window.onload = function() {
- var ctx = document.getElementById("c1").getContext("2d");
- ctx.rect(50, 50, 200, 50);
- ctx.rect(50, 50, 50, 200);
- ctx.rect(250, 250, -200, -50);
- ctx.rect(250, 250, -50, -200);
- ctx.fill();
- }
- </script>
- </head>
- <body>
- <div><canvas id="c1" width="300" height="300"></canvas></div>
- </body>
- </html>
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